#include <stdio.h>
#include <openssl/bio.h>
#include <openssl/ssl.h>

void init_openssl(void) { 
    SSL_library_init();
    SSL_load_error_strings();
    ERR_load_BIO_strings();
    OpenSSL_add_all_algorithms();
}

SSL_CTX *create_context() {
    const SSL_METHOD *method;
    SSL_CTX *ctx;

    method = SSLv23_server_method();

    ctx = SSL_CTX_new(method);
    if (!ctx) {
	printf("Unable to create context!\n");
	exit(1);
    }

    return ctx;
}

int main(int argc, char **argv) {
    SSL_CTX *ctx;
    SSL *ssl;
    BIO *in_bio;
    BIO *out_bio;
    const char *version;

    init_openssl();
    ctx = create_context();
    ssl = SSL_new(ctx);
    in_bio = BIO_new(BIO_s_mem());
    out_bio = BIO_new(BIO_s_mem());

    if ((in_bio == NULL) || (out_bio == NULL)) {
        printf("Unable to allocate BIOs\n");
        exit(2);
    }

    SSL_set_bio(ssl, in_bio, out_bio);
    SSL_set_connect_state(ssl);

    version = SSL_get_version(ssl);
    printf("Version: %s\n", version);

    SSL_free(ssl);
    SSL_CTX_free(ctx);
    return 0;
}